Interfacing old transducers into a NMEA Multiplexor

[sailcinderella]

I'm trying to find some info on transducers installed in my boat. I'm hoping you guys can help me.

I had an old KVH quatro system installed on our boat when we left WA on a trip around the world. The first night out, we were pooped by a wave and I watched as those old KVH screens slowly faded out.

Since then we purchased a cheap depth display in MX from another cruiser to have depth again. I wired it to the old depth transducer which I believe is a P17 and we had a readout again.

One of the 3 pins on the back of that display has since broken off and now we are again without depth.

Bummer.

I happen to have a NMEA multiplexor that I was hoping to use to get the transducer info into OpenCPN since we are now in Tahiti and getting parts is a PITA.

Any idea if my depth transducer is NMEA? If so, which two wires should I feed to the multiplexor? It has 3 wires coming out.

Thanks for any help you can provide. We are about to sail for the Tuamotus and I'm really hoping to at least have a depth readout again.